From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Letter to Hardy Spicer & Co. Ltd. concerning tightening problems with a Rudge Whitworth wheel.
| Identifier | ExFiles\Box 159\7\ scan0184 | |
| Date | 18th February 1938 | |
| 1375 February 18th.1938 Rm {William Robotham - Chief Engineer} /Gry. {Shadwell Grylls} 7/AP. J.A.Daniell Esq., Messrs. Hardy Spicer & Co.Ltd., Birch Road, Witton, BIRMINGHAM. Dear Mr.Daniell, Will you forgive me if I worry you about an old friend of yours, namely the Rudge Whitworth wheel. We have come to the conclusion that it is impossible sufficiently to tighten an R.W. wheel so that the whole of the driving torque is taken on the inner cone and none on the splines. Unless this is so clunks arise on torque reversal. The real trouble seems to be that all the effort of lightening the wheel nut is used on the outer cone even when lubricated, owing to it being a 10° angle. I thought you would be able to tell us why the 10° is 10° and not say 30°. Obviously, an increase in this angle would enable one to get the wheels on tighter. Yours sincerely, | ||